package cn.weixin.song.util;

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.jcbase.core.util.FileUtils;

public class QRCodeUtil {
	private static final String CHARSET = "utf-8";  
    private static final String FORMAT_NAME = "PNG";  
    // 二维码尺寸  
    private static final int QRCODE_SIZE = 200;  
    // LOGO宽度  
    private static final int WIDTH = 60;  
    // LOGO高度  
    private static final int HEIGHT = 60;  
  
    private static BufferedImage createImage(String content, String imgPath,  
            boolean needCompress) throws Exception {  
        return createImage(content,  imgPath,  
                 needCompress,QRCODE_SIZE);  
    }  
    private static BufferedImage createImage(String content, String imgPath,  
            boolean needCompress,int qrcodeSize) throws Exception {  
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();  
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);  
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);  
        hints.put(EncodeHintType.MARGIN, 1);  
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,  
                BarcodeFormat.QR_CODE, qrcodeSize, qrcodeSize, hints);  
        int width = bitMatrix.getWidth();  
        int height = bitMatrix.getHeight();  
        BufferedImage image = new BufferedImage(width, height,  
                BufferedImage.TYPE_INT_RGB);  
        for (int x = 0; x < width; x++) {  
            for (int y = 0; y < height; y++) {  
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000  
                        : 0xFFFFFFFF);  
            }  
        }  
        if (imgPath == null || "".equals(imgPath)) {  
            return image;  
        }  
        // 插入图片  
        QRCodeUtil.insertImage(image, imgPath, needCompress,qrcodeSize);  
        return image;  
    } 
    /** 
     * 插入LOGO 
     *  
     * @param source 
     *            二维码图片 
     * @param imgPath 
     *            LOGO图片地址 
     * @param needCompress 
     *            是否压缩 
     * @throws Exception 
     */  
    private static void insertImage(BufferedImage source, String imgPath,  
            boolean needCompress,int qrcodeSize) throws Exception {  
        File file = new File(imgPath);  
        if (!file.exists()) {  
            return;  
        }  
        Image src = ImageIO.read(new File(imgPath));  
        int width = src.getWidth(null);  
        int height = src.getHeight(null);  
        if (needCompress) { // 压缩LOGO  
            if (width > qrcodeSize/QRCODE_SIZE*WIDTH) {  
                width = qrcodeSize/QRCODE_SIZE*WIDTH;  
            }  
            if (height > qrcodeSize/QRCODE_SIZE*HEIGHT) {  
                height = qrcodeSize/QRCODE_SIZE*HEIGHT;  
            }  
            Image image = src.getScaledInstance(width, height,  
                    Image.SCALE_SMOOTH);  
            BufferedImage tag = new BufferedImage(width, height,  
                    BufferedImage.TYPE_INT_RGB);  
            Graphics g = tag.getGraphics();  
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图  
            g.dispose();  
            src = image;  
        }  
        // 插入LOGO  
        Graphics2D graph = source.createGraphics();  
        int x = (qrcodeSize - width) / 2;  
        int y = (qrcodeSize - height) / 2;  
        graph.drawImage(src, x, y, width, height, null);  
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);  
        graph.setStroke(new BasicStroke(3f));  
        graph.draw(shape);  
        graph.dispose();  
    }  
  
    /** 
     * 生成二维码(内嵌LOGO) 
     *  
     * @param content 
     *            内容 
     * @param imgPath 
     *            LOGO地址 
     * @param destPath 
     *            存储地址 
     * @param needCompress 
     *            是否压缩LOGO 
     * @throws Exception 
     */  
    public static void encode(String content, String imgPath, String destPath,  
            boolean needCompress) throws Exception {  
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,  
                needCompress);  
    //    FileUtils.mkdirs(destPath);  
        FileUtils.mkdir(destPath, false);
        ImageIO.write(image, FORMAT_NAME, new File(destPath));  
    }  
    /**
     * 
     * @author eason	
     * @param content   内容
     * @param imgPath   LOGO地址 
     * @param destPath  存储地址
     * @param needCompress 是否压缩LOGO
     * @param qrcodeSize 二维码大小 宽高
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath,  
            boolean needCompress,int qrcodeSize) throws Exception {  
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,  
                needCompress,qrcodeSize);  
        FileUtils.mkdir(destPath, false);
        ImageIO.write(image, FORMAT_NAME, new File(destPath));  
    }  
  
  
    /** 
     * 生成二维码(内嵌LOGO) 
     *  
     * @param content 
     *            内容 
     * @param imgPath 
     *            LOGO地址 
     * @param destPath 
     *            存储地址 
     * @throws Exception 
     */  
    public static void encode(String content, String imgPath, String destPath)  
            throws Exception {  
        QRCodeUtil.encode(content, imgPath, destPath, false);  
    }  
    public static void encode(String content, String imgPath, String destPath,int qrcodeSize)  
            throws Exception {  
        QRCodeUtil.encode(content, imgPath, destPath, false);  
    } 
    /** 
     * 生成二维码 
     *  
     * @param content 
     *            内容 
     * @param destPath 
     *            存储地址 
     * @param needCompress 
     *            是否压缩LOGO 
     * @throws Exception 
     */  
    public static void encode(String content, String destPath,  
            boolean needCompress) throws Exception {  
        QRCodeUtil.encode(content, null, destPath, needCompress);  
    }  
  
    /** 
     * 生成二维码 
     *  
     * @param content 
     *            内容 
     * @param destPath 
     *            存储地址 
     * @throws Exception 
     */  
    public static void encode(String content, String destPath) throws Exception {  
        QRCodeUtil.encode(content, null, destPath, false);  
    }  
  
    /** 
     * 生成二维码(内嵌LOGO) 
     *  
     * @param content 
     *            内容 
     * @param imgPath 
     *            LOGO地址 
     * @param output 
     *            输出流 
     * @param needCompress 
     *            是否压缩LOGO 
     * @throws Exception 
     */  
    public static void encode(String content, String imgPath,  
            OutputStream output, boolean needCompress) throws Exception {  
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,  
                needCompress);  
        ImageIO.write(image, FORMAT_NAME, output);  
    }  
    /**
     * 
     * @author eason	
     * @param content  内容 
     * @param imgPath  LOGO地址 
     * @param output 输出流
     * @param needCompress  是否压缩LOGO 
     * @param qrcodeSize
     * @throws Exception
     */
    public static void encode(String content, String imgPath,  
            OutputStream output, boolean needCompress,int qrcodeSize) throws Exception {  
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,  
                needCompress,qrcodeSize); 
        ImageIO.write(image, FORMAT_NAME, output);  
    }  
    public static void encode(String content, OutputStream output,int qrcodeSize)  
            throws Exception {  
        QRCodeUtil.encode(content, null, output, false,qrcodeSize);  
    }  
    /** 
     * 生成二维码 
     *  
     * @param content 
     *            内容 
     * @param output 
     *            输出流 
     * @throws Exception 
     */  
    public static void encode(String content, OutputStream output)  
            throws Exception {  
        QRCodeUtil.encode(content, null, output, false);  
    }  
  
    /** 
     * 解析二维码 
     *  
     * @param file 
     *            二维码图片 
     * @return 
     * @throws Exception 
     */  
    public static String decode(File file) throws Exception {  
        BufferedImage image;  
        image = ImageIO.read(file);  
        if (image == null) {  
            return null;  
        }  
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(  
                image);  
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));  
        Result result;  
        Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();  
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);  
        result = new MultiFormatReader().decode(bitmap, hints);  
        String resultStr = result.getText();  
        return resultStr;  
    }  
  
    /** 
     * 解析二维码 
     *  
     * @param path 
     *            二维码图片地址 
     * @return 
     * @throws Exception 
     */  
    public static String decode(String path) throws Exception {  
        return QRCodeUtil.decode(new File(path));  
    }  
  
    public static void main(String[] args) throws Exception {  
        String text = "{\"partId\":234}";  
        QRCodeUtil.encode(text, "/Users/yulong/git/myutils/logo_180x180.png", "/Users/yulong/git/myutils/logo3.png", false,600);  
    }  
}
